Let me give you a 30-second summary of the purpose of my call.

"And what was the purpose of his call to you?"

The purpose of Kenmuir's call was mainly to further his deception.

But that was not the main purpose of her call.

I almost forgot the original purpose of my call.

"Listen," he said, dragging himself back to the purpose of his call.

"May I tell the professor the purpose of your call?"

"I hope that you will forgive me if I come quickly to the purpose of my call," he said.

And now-I will come to the purpose of my call upon you.

I told her who I was, and the purpose of my call.